<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    .box{
        width: 800px;
        height: 50px;
        background-color: darkblue;
    }
    .image-background{
        width: 300px;
        height: 500px;
        background-image: url(./th.jpg);
    }
    .cover-image{
        width: 300px;
        height: 500px;
        background-image: url(./OIP-C.jpg);
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }
    .header{
        width: 500px;
        height: 300px;
        background-image: url(./示例图片.jpg);
        background-color: aqua;
        background-position: bottom right; 
        background-repeat: no-repeat; 
    }
    .pattern{
        width: 300px;
        height: 1000px;
        background-repeat: repeat-y; 
        background-position: top left; 
        background-image: url(./th.jpg);

    }
</style>
<body>
    <div class="box"></div>
    <div class="image-background"></div>
    <div class="cover-image"></div>
    <div class="header"></div>
    <div class="pattern"></div>
</body>
</html>